Juan Carlos Unzue has revealed how Diego Maradona lost eight kilos in a week to be fit for a Barcelona clash with Real Madrid.

Unzue has worked closely with Barcelona over the years, even sharing his time there with Lionel Messi too.

"We had to play against Real Madrid around Christmas, Maradona went to spend the holidays with his family and when we saw him seven days later, he had lost eight kilos," Unzue explained in an interview with Idols.

"Can you believe that he told us all he had eaten was a kind of raw meat for those seven or eight days?

"We used to talk to him about his personal life, he would warn us that he was only telling us things because he had made a mistake and he didn't want us to fall victim to the same mistakes."